<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body" v-for="(shop, index) in cartList" :key="index">
        <ul class="cart-list" v-for="cart in shop.cartInfoList" :key="cart.id">
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked == 1"
              @change="updateChecked(cart, $event)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">
              {{ cart.skuName }}
            </div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.skuPrice }}.00</span>
          </li>
          <li class="cart-list-con5">
            <span class="mins" @click="handler('minus', -1, cart)">-</span>
            <input
              autocomplete="off"
              type="text"
              minnum="1"
              class="itxt"
              :value="cart.skuNum"
              @change="handler('change', $event.target.value * 1, cart)"
            />
            <span class="plus" @click="handler('add', 1, cart)">+</span>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.skuNum * cart.skuPrice }}.00</span>
          </li>
          <li class="cart-list-con7">
            <span class="sindelet" @click="deleteCartById(cart)">删除</span>
          </li>
        </ul>
        <div class="order-date">加入购物车时间：{{ shop.createTime }}</div>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input
          class="chooseAll"
          type="checkbox"
          style="margin-right: 8px"
          :checked="isAllCheck && cartInfoList.length > 0"
          @change="updateAllCartChecked"
        />
        <span>全选</span>
      </div>
      <div class="option">
        <span @click="deleteAllCheckedCart">删除选中的商品</span>
      </div>
      <div class="money-box">
        <div class="sumprice">
          <em>总价 ：</em>
          <i class="summoney">{{ totalPrice }}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapGetters } from "vuex";
import { reqAddToCart } from "@/api";
export default {
  name: "ShopCart",
  activated() {
    this.getData();
  },
  computed: {
    ...mapGetters(["cartList"]),
    //购物车数据
    cartInfoList() {
      let totalShop = [];
      this.cartList.forEach((item) => {
        item.cartInfoList.forEach((shop) => {
          totalShop.push(shop);
        });
      });
      return totalShop
    },
    // 计算商品总价
    totalPrice() {
      let sum = 0;
      this.cartList.forEach((item) => {
        item.cartInfoList.forEach((shop) => {
          sum += shop.skuNum * shop.skuPrice;
        });
      });
      return sum;
    },
    isAllCheck() {
      // 遍历购物车全部商品，只要全部商品isChecked属性为1 ===> 真
     
      return this.cartInfoList.every(shop => shop.isChecked == 1);
    },
  },
  methods: {
    getData() {
      this.$store.dispatch("getCartList");
    },
    // 修改产品的个数
    handler(type, disNum, cart) {
      console.log(disNum);
      console.log(cart);
      // type: 为了区别 增、减、input数量的三种类型
      // disNum形参： +变化量(1) -变化量(-1) input最终的个数(并不是变化量)
      //cart:哪一个产品【有id】
      //向服务器发请求，修改数量
      switch (type) {
        case "add":
          disNum = 1;
          break;
        case "minus":
          // 判断产品的个数大于1，才可以传递给服务器(-1)
          // 如果出现产品的个数小于等于1，传递给服务器(0) [原封不动]
          disNum = cart.skuNum > 1 ? -1 : 0;
          break;
        case "change":
          // 用户输入的产品个数，如果是非法的（带有汉字|出现负数），传递给服务器（0）
          if (isNaN(disNum) || disNum < 1) {
            disNum = 0;
          } else {
            disNum = parseInt(disNum);
          }
          break;
      }
      // 修改购物车产品数量
      reqAddToCart(cart.skuId, disNum)
        .then((res) => {
          if (res.code == 200) {
            //再一次获取服务器最新的数据进行展示
            this.getData();
          }
        })
        .catch((err) => {
          console.log(err);
        });
    },
    // 删除某一产品
    async deleteCartById(cart) {
      console.log(cart.skuId);
      try {
        await this.$store.dispatch("deleteCartListBySkuId", cart.skuId);
        this.getData();
      } catch (error) {
        console.log(error);
      }
    },
    // 删除全部选中产品
    async deleteAllCheckedCart() {
      try {
        await this.$store.dispatch("deleteAllCheckedCart");
        this.getData();
      } catch (error) {
        console.log(error);
      }
    },
    // 修改某产品的勾选状态
    async updateChecked(cart, event) {
      // 带给服务器的参数 isChecked,不是布尔值 是 0|1
      console.log(event);
      try {
        let isChecked = event.target.checked ? "1" : "0";
        await this.$store.dispatch("updateCheckedById", {
          skuId: cart.skuId,
          isChecked,
        });
        this.getData();
      } catch (error) {
        console.log(error);
      }
    },
    // 修改全部产品的选中状态
    async updateAllCartChecked(event) {
      console.log(event);
      try {
        let isChecked = event.target.checked ? "1" : "0";
        await this.$store.dispatch("updateAllCartIsChecked", isChecked);
        this.getData();
      } catch (error) {
        console.log(error);
      }
    },
  },
};
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;
  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }
  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;
      & > div {
        float: left;
      }
      .cart-th1 {
        width: 25%;
        input {
          vertical-align: middle;
        }
        span {
          vertical-align: middle;
        }
      }
      .cart-th2 {
        width: 25%;
      }
      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }
    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;
      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;
        & > li {
          float: left;
        }
        .cart-list-con1 {
          width: 15%;
        }
        .cart-list-con2 {
          width: 35%;
          img {
            width: 82px;
            height: 82px;
            float: left;
          }
          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }
        .cart-list-con4 {
          width: 10%;
        }

        .cart-list-con5 {
          width: 16%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 32px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 12%;

          .sum {
            font-size: 14px;
          }
        }

        .cart-list-con7 {
          width: 10%;

          span {
            color: #666;
          }
        }
      }
      .order-date {
        text-align: right;
        padding: 10px;
      }
    }
  }
  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;
    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;
      span {
        vertical-align: middle;
      }
      input {
        vertical-align: middle;
      }
    }
    .option {
      padding: 10px;
      overflow: hidden;
      float: left;
      span {
        float: left;
        padding: 0 10px;
        color: #666;
        cursor: pointer;
      }
    }
    .money-box {
      float: right;
      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }
      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;
        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }
      .sumbtn {
        float: right;
        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>